CVE-2026-53946Network attack vector

Authenticated SSRF via unrestricted image-card URL fetch

Published Jun 24, 2026 · Updated Jun 24, 2026

SSRF in Ghost 6.19.4 through 6.21.0 allows remote authenticated users to make server-side requests via crafted image cards. The Mobiledoc populateImageSizes path passes an image card's unrestricted src URL to getImageSizeFromUrl when dimensions are missing. Staff access to create or edit posts and a re-render are required; the blind request can reach internal services or cloud metadata endpoints.

CVSS severity5.4
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Ghost 6.19.4 through 6.21.0 allows remote authenticated users to make server-side requests via crafted image cards. The Mobiledoc populateImageSizes path passes an image card's unrestricted src URL to getImageSizeFromUrl when dimensions are missing. Staff access to create or edit posts and a re-render are required; the blind request can reach internal services or cloud metadata endpoints.

The record

CVE
CVE-2026-53946
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
Ghost Foundation
Product
Ghost
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 6.19.4, < 6.21.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ghost Foundation · Ghostversion=>= 6.19.4, < 6.21.1

Published CVSS scores

5.4GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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